An iterative scheme for the determination of the conformal mapping coefficients used in closed-form solutions for tunnels with arbitrary geometry

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Abstract

In case of tunnels with arbitrary geometries, solutions for stresses and displacements
in the tunnel exterior might be derived with the aid of the conformal mapping technique of the complex variable method. Thereby, the physical tunnel domain is mapped onto a fictitious unit circle domain on which the elastic potentials, as part of the final solution, are evaluated. The used mapping function involves complex mapping coefficients. In this paper an overview of analytical solutions
for stress and displacements fields around tunnels is provided, from the early Kirsch solution to the solutions involving the complex variable theory and conformal mapping. A possible solution procedure for the determination of these mapping coefficients based on an iterative process including the solution of linear systems of equations is presented. The proposed solution procedure can be
utilized for the determination of the mapping coefficients of various conformal mapping functions as defined in different closed-form solutions.
Original languageEnglish
Title of host publicationProceedings of the 15th International ISRM Conference 2023 & 72nd Geomechanics Colloquium
Subtitle of host publicationChallenges in Rock Mechanics and Rock Engineering
EditorsWulf Schubert, Alexander Kluckner
Place of PublicationSalzburg
PublisherAustrian Society for Geomechanics
Pages1793-1798
Number of pages6
ISBN (Electronic)978-3-9503898-3-8
Publication statusPublished - 10 Oct 2023
Event15th ISRM Congress 2023 & 72nd Geomechanics Colloquium: ISRM 2023 - Congress Salzburg, Salzburg, Austria
Duration: 9 Oct 202314 Oct 2023
https://www.isrm2023.com/de/

Conference

Conference15th ISRM Congress 2023 & 72nd Geomechanics Colloquium
Abbreviated titleISRM 2023
Country/TerritoryAustria
CitySalzburg
Period9/10/2314/10/23
Internet address

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